Head to head
Chalmers’s Panpsychism vs Functionalism
Chalmers’s Panpsychism and Functionalism, compared field by field from their entries in the Atlas.
At a glance
- Chalmers’s Panpsychism belongs to the Panpsychism family in Kuhn's Landscape of Consciousness, Functionalism to Materialism.
- Chalmers’s Panpsychism treats consciousness as fundamental; Functionalism treats it as emergent.
- On AI consciousness, Chalmers’s Panpsychism says “Conditional” and Functionalism says “Yes”.
- On life after death, Chalmers’s Panpsychism says “Uncertain” and Functionalism says “Conditional”.
- On mind uploading, Chalmers’s Panpsychism says “Uncertain” and Functionalism says “Likely”.
- On meaning and purpose, Chalmers’s Panpsychism says “Uncertain” and Functionalism says “Humanistic only”.
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The claim
In brief
Chalmers’s PanpsychismDavid Chalmers argues that consciousness may be a fundamental feature of physical reality, carried by the intrinsic properties of its most basic entities. He treats panpsychism, and its cousin panprotopsychism, as a synthesis of materialism and dualism, and holds that it would become the most promising answer to the mind-body problem if someone solves the combination problem.
FunctionalismFunctionalism posits that mental states are defined by their causal relations to one another, to sensory inputs, and to behavioral outputs, independent of the physical medium (substrate) in which they are realized. The essence of consciousness is determined by how mental states function or operate, rather than by what they are materially composed of.
What consciousness is
Chalmers’s PanpsychismChalmers identifies consciousness with the intrinsic properties of fundamental physical entities, the categorical bases of the dispositions that physics describes. Physics tells us what basic entities do; on this view, phenomenal or protophenomenal properties are what they are.
FunctionalismMental states are identified as functional states, constituted by their causal relations, roles, results, and outputs, implying they are realizable in any substrate that supports those functions.
Big questions
Can AI be conscious?Differ
Chalmers’s PanpsychismConditionalSince every physical system has phenomenal or protophenomenal properties at its base, an AI is built from the same ingredients as a brain. Whether it forms a unified conscious subject depends on how the unsolved combination problem is answered.
FunctionalismYesFunctionalism holds that consciousness is based on function, not biology. If the correct functions can be realized computationally in non-biological substrates, AI consciousness is possible in principle and certain if Materialism is true.
Chalmers’s PanpsychismUncertainThe fundamental properties outlast any body, but nothing in the view says whether the particular combined subject survives once the brain's structure breaks down.
FunctionalismConditionalAs a physicalist theory, consciousness is tied to the substrate. Survival beyond death of the biological body is only possible if the functional mental state can be successfully transferred (uploaded) to a new, continuing substrate (virtual immortality).
Chalmers’s PanpsychismUncertainAn upload would be made of the same fundamental properties, but whether it reconstitutes the same subject turns on the unsolved combination problem.
FunctionalismLikelyFunctionalism serves as the theoretical basis for virtual immortality. If the functional role of the mental self can be perfectly duplicated and uploaded to a new medium, the first-person mental self is preserved.
Chalmers’s PanpsychismUncertainPlacing experience in the basic fabric of nature gives it a cosmic footing, but Chalmers draws no conclusions about meaning or purpose.
FunctionalismHumanistic onlyFunctionalism describes the mechanism by which mind/consciousness operates within a physical world, providing capacities for agency and reflection, but offers no rationale for ultimate cosmic meaning or teleology, aligning with the general stance of Materialism.
Nature of mind
Ontology
Chalmers’s PanpsychismPanpsychism (Russellian monism)
FunctionalismPhysicalism (broadly, agnostic to substance). The theory is classified under Materialism, but it is metaphysically agnostic regarding nonphysical substances, focusing primarily on the functional description of mental states.
Mind and body
Chalmers’s PanpsychismMind and matter are two sides of one fundamental stuff that has both physical and phenomenal properties. Chalmers places this ‘monism’ in the sixth of his six classes of views, the nonreductive ones that expand or reconceive physical ontology.
FunctionalismMental states are functional states identical to the functional roles that are realized or instantiated in a physical substrate, leading to 'functional state identity theses'.
Fundamental or emergent
Chalmers’s PanpsychismPrimitive
FunctionalismEmergent. Consciousness arises from the functional organization realized by a sufficiently complex substrate (like neural tissue or computer chips).
Qualia
Chalmers’s PanpsychismQualia are real and irreducible. In the panpsychist version they exist in simple form at the fundamental level; in the panprotopsychist version, basic entities have protophenomenal properties that are not themselves experiences but can ground them.
FunctionalismThe theory traditionally struggles to account for phenomenal qualia, often addressing them by asserting that the qualitative feel is entirely exhausted by the functional role, or by coupling with representational theories.
How it works
Mechanism
Chalmers’s PanpsychismChalmers reasons dialectically. Materialism (thesis) meets dualism (antithesis) and yields panpsychism; panprotopsychism challenges it and yields Russellian monism; the combination problem then challenges Russellian monism, with no settled resolution yet.
FunctionalismThe principle of multiple realizability, stating that mental state realization is independent of the physical substrate, contingent only upon the required function being instantiated.
Where it is
Chalmers’s PanpsychismThroughout physical reality, at the level of its most basic entities.
FunctionalismDistributed wherever the functional organization is successfully realized, regardless of whether the substrate is neural tissue or hardwired computing components.
What it does
Chalmers’s PanpsychismBecause phenomenal or protophenomenal properties are the categorical bases of physical dispositions, consciousness sits at the base of physical causation itself.
FunctionalismFunctions, roles, and outputs are dispositive. Mental states are causally effective because they are defined by their causal relations within the system (functional role).
Evidence and criticism
Testability
Chalmers’s PanpsychismConceptually testable
FunctionalismConceptually and empirically testable. Thought experiments (like substrate replacement) probe its conceptual limits, and computational realization (AI) tests its empirical application.
Tests so far
Chalmers’s PanpsychismNot stated
FunctionalismThe silicon chip replacement thought experiment is used conceptually to test whether phenomenal consciousness is preserved when the functional role is maintained across a change in substrate.
Criticisms
Chalmers’s PanpsychismThe combination problem is the central difficulty, and Chalmers concedes it is unsolved. He also calls panpsychism initially counterintuitive, holding that the sense of oddity fades on reflection.
FunctionalismIt is criticized heavily for failing to account for phenomenal consciousness (qualia) by describing only the functional role, leading to the 'hard problem' challenge that functional roles may not exhaust the nature of conscious experience.
Sources
Key sources
Chalmers’s Panpsychism
- Chalmers’s Panpsychism, David Chalmers (Landscape of Consciousness entry)
Functionalism
- What is functionalism? (N. Block) (1980)
- What Is Functionalism? Consciousness, Function, and Representation (N. Block) (2007)
- Functionalism (J. Levin) (2023)